rabbitMQ - 3 - springboot集成使用rab

2019-04-25 本文已影响0人 cf6bfeab5260

环境

jdk1.8
rabbitmq 3.7.9

1 创建项目

idea创建项目时可以直接引入rabbitmq的依赖。

image.png

生成的pom：

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.4.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.example</groupId>
    <artifactId>springboot_rabbitmq</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>springboot_rabbitmq</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-amqp</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

spring-boot-starter-amqp 的版本会自动使用与spring-boot-starter-parent版本匹配的版本。

2 配置

application.properties:

spring.application.name=springboot-rabbitmq
spring.rabbitmq.host=127.0.0.1
spring.rabbitmq.port=5672
spring.rabbitmq.username=guest
spring.rabbitmq.password=guest
spring.rabbitmq.publisher-confirms=true
spring.rabbitmq.virtual-host=/

或者 application.yml：

spring:
  application:
    name: springboot-rabbitmq
  rabbitmq:
    host: 127.0.0.1
    port: 5672
    username: guest
    password: guest
    publisher-confirms: true
    virtual-host: /

配置了broker的ip、端口、用户名、密码、vhost，这里的 publisher-confirms: true表示在exchange成功发送消息到queue以后，会给生产者发送确认消息。这一部分下一章详细讲解。

3 初始化

package com.example.springboot_rabbitmq.rabbitmq;

import org.springframework.amqp.core.Binding;
import org.springframework.amqp.core.BindingBuilder;
import org.springframework.amqp.core.FanoutExchange;
import org.springframework.amqp.core.Queue;
import org.springframework.amqp.core.TopicExchange;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

/**
 * @author: zenghong
 * @Date: 2019/4/25 09:42
 * @Description: TODO
 */
@Configuration
public class RabbitMQInit {
    final static String queueName = "hello";

    @Bean
    public Queue helloQueue() {
        return new Queue("hello");
    }
}

这里初始化了一个名为 hello 的queue

4 编写生产者和消费者

package com.example.springboot_rabbitmq.rabbitmq.sender;

import org.springframework.amqp.core.RabbitTemplate;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import java.util.Date;

/**
 * @author: zenghong
 * @Date: 2019/4/25 09:45
 * @Description: TODO
 */
@Component
public class HelloSender {
    @Autowired
    private RabbitTemplate rabbitTemplate;

    public void send() {
        String sendMsg = "hello1 " + new Date();
        System.out.println("Sender1 : " + sendMsg);
        this.rabbitTemplate.convertAndSend("hello", sendMsg);
    }
}

this.rabbitTemplate.convertAndSend 第一个参数是 routing key，第二个参数是发送的msg。

package com.example.springboot_rabbitmq.rabbitmq.consumer;

import org.springframework.amqp.rabbit.annotation.RabbitHandler;
import org.springframework.amqp.rabbit.annotation.RabbitListener;
import org.springframework.stereotype.Component;

/**
 * @author: zenghong
 * @Date: 2019/4/25 09:46
 * @Description: TODO
 */
@Component
@RabbitListener(queues = "hello")
public class HelloCosumer {
    @RabbitHandler
    public void process(String hello) {
        System.out.println("Receiver1  : " + hello);
    }
}

消费者监听名为 hello 的queue

5 启动

Connected to the target VM, address: '127.0.0.1:49579', transport: 'socket'

  .   ____          _            __ _ _
 /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::        (v2.1.4.RELEASE)

2019-04-25 10:33:48.460  INFO 192 --- [           main] c.e.s.SpringbootRabbitmqApplication      : Starting SpringbootRabbitmqApplication on cenghongdeMacBook-Pro.local with PID 192 (/Users/zenghong/Documents/code/other/wed-job/springboot_rabbitmq/target/classes started by zenghong in /Users/zenghong/Documents/code/other/wed-job/springboot_rabbitmq)
2019-04-25 10:33:48.463  INFO 192 --- [           main] c.e.s.SpringbootRabbitmqApplication      : No active profile set, falling back to default profiles: default
2019-04-25 10:33:49.591  INFO 192 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat initialized with port(s): 8080 (http)
2019-04-25 10:33:49.613  INFO 192 --- [           main] o.apache.catalina.core.StandardService   : Starting service [Tomcat]
2019-04-25 10:33:49.613  INFO 192 --- [           main] org.apache.catalina.core.StandardEngine  : Starting Servlet engine: [Apache Tomcat/9.0.17]
2019-04-25 10:33:49.713  INFO 192 --- [           main] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring embedded WebApplicationContext
2019-04-25 10:33:49.713  INFO 192 --- [           main] o.s.web.context.ContextLoader            : Root WebApplicationContext: initialization completed in 1204 ms
2019-04-25 10:33:50.073  INFO 192 --- [           main] o.s.s.concurrent.ThreadPoolTaskExecutor  : Initializing ExecutorService 'applicationTaskExecutor'
2019-04-25 10:33:50.431  INFO 192 --- [           main] o.s.a.r.c.CachingConnectionFactory       : Attempting to connect to: [127.0.0.1:5672]
2019-04-25 10:33:50.467  INFO 192 --- [           main] o.s.a.r.c.CachingConnectionFactory       : Created new connection: rabbitConnectionFactory#396ef8b2:0/SimpleConnection@6949e948 [delegate=amqp://guest@127.0.0.1:5672/, localPort= 49587]
2019-04-25 10:33:50.571  INFO 192 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat started on port(s): 8080 (http) with context path ''
2019-04-25 10:33:50.576  INFO 192 --- [           main] c.e.s.SpringbootRabbitmqApplication      : Started SpringbootRabbitmqApplication in 2.708 seconds (JVM running for 4.35)

启动成功以后可以看到控制台已经创建好了hello队列：

image.png

并且bind了默认的exchange：

image.png

我们看一看默认的exchange：

image.png
可以看出，它是一个direct的exchange。不是说好的direct需要routing key和binding key完全匹配才能接收消息么？注意这句话：

image.png

意思是说，这个默认的exchange 会绑定到每一个queue，并且会把消息发送给队列名与routing key完全相同的队列（类似于以queue name为binding key）。所以上面咱们的sender的代码写的routing key 是 hello，与我们创建的queue名字一样。

6 测试

6.1 编写测试类

package com.example.springboot_rabbitmq.controller;

import com.example.springboot_rabbitmq.rabbitmq.sender.HelloSender;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

/**
 * @author: zenghong
 * @Date: 2019/4/25 09:49
 * @Description: TODO
 */
@RestController
@RequestMapping("/rabbit")
public class RabbitMqController {
    @Autowired
    private HelloSender helloSender1;

    @PostMapping("/hello")
    public String hello() {
        helloSender1.send();
        return "success";
    }

}

这里写了一个rest接口来触发消息发送。

6.2 发送请求到 `http://localhost:8080/rabbit/hello`

image.png

后台日志：

从后台日志可以看到消息一经成功发送和被接收了。
再看看控制台：

image.png
我们可以看到，有一条消息被发送，并且被接收了。

下一章 4 代码使用4种Exchange

rabbitMQ - 3 - springboot集成使用rab

环境

1 创建项目

2 配置

3 初始化

4 编写生产者和消费者

5 启动

6 测试

6.1 编写测试类

6.2 发送请求到 `http://localhost:8080/rabbit/hello`

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rabbitMQ - 3 - springboot集成使用rab

环境

1 创建项目

2 配置

3 初始化

4 编写生产者和消费者

5 启动

6 测试

6.1 编写测试类

6.2 发送请求 到 http://localhost:8080/rabbit/hello

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6.2 发送请求到 `http://localhost:8080/rabbit/hello`